﻿<blockquote class="extDef">
NOTE&nbsp; Definition according to ISO/CD 10303-41:1992<br>
A measure with unit is the specification of a physical quantity  as defined in ISO 31 (clause 2).</blockquote>

<p><em>IfcMeasureWithUnit</em> has two usages:<br>
1. For representing measure value together with its unit on the entity type attribute level; thus
   overriding the IFC model global unit assignments.<br>
2. For conversion based unit to give the conversion rate and its base.
</p>

<blockquote class="note">
NOTE&nbsp; Corresponding ISO 10303 name: measure_with_unit, please refer to ISO/IS 10303-41 for the final definition of the formal standard.
</blockquote>

<blockquote class="history">
HISTORY&nbsp; New entity in IFC1.5.1.
</blockquote>